mirror of https://github.com/ARMmbed/mbed-os.git
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
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* Copyright (c) 2015, 2018, Arm Limited and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ns_types.h"
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#include "arm_hal_random.h"
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#include "mbedtls/entropy_poll.h"
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#ifdef MBEDTLS_ENTROPY_HARDWARE_ALT
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#endif
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#endif
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void arm_random_module_init(void)
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{
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}
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uint32_t arm_random_seed_get(void)
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{
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uint32_t result = 0;
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#ifdef MBEDTLS_ENTROPY_HARDWARE_ALT
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#if defined(MBEDTLS_PLATFORM_C)
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mbedtls_platform_setup(NULL);
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#endif /* MBEDTLS_PLATFORM_C */
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/* Grab a seed from a function we provide for mbedtls */
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size_t len;
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mbedtls_hardware_poll(NULL, (uint8_t *) &result, sizeof result, &len);
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#if defined(MBEDTLS_PLATFORM_C)
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mbedtls_platform_teardown(NULL);
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#endif /* MBEDTLS_PLATFORM_C */
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#endif
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return result;
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}
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